CN118162966A - A device and method for polishing the inner surface of an ultra-long and ultra-thin pipe - Google Patents

Abstract

The invention provides a device and a method for polishing the inner surface of an ultra-long superfine pipe fitting, which are applied to a pipe fitting to be polished, the length of the pipe fitting is greater than or equal to 6 meters and less than or equal to 14 meters, the pipe diameter of the pipe fitting is less than or equal to 20mm, a pipe fitting clamping part is arranged for clamping and fixing the pipe fitting to be polished and limiting the radial runout of the pipe body of the pipe fitting to be polished, an output end of an axial driving part is used for outputting reciprocating motion along a first direction, an output end of a rotary output part is used for outputting rotary motion taking the axis of the pipe fitting to be polished as a rotary shaft, a rotary rod piece is used for extending into an inner cavity of the pipe fitting to be polished, a plurality of guide wheels are used for limiting the radial runout generated by the rotary rod piece in the pipe fitting to be polished, and a plurality of polishing units are used for polishing the inner surface of the pipe fitting to be polished. The device and the method for polishing the inner surface of the ultra-long ultra-fine pipe fitting can be applied to the inner surface polishing operation of the ultra-long ultra-fine pipe fitting.

Description

A device and method for polishing the inner surface of an ultra-long and ultra-thin pipe

Technical Field

The invention belongs to the technical field of stainless steel pipe polishing, and in particular relates to a device and method for polishing the inner surface of an ultra-long and ultra-thin pipe.

Background technique

The mechanical polishing operation of the inner surface of stainless steel pipe fittings includes the use of mechanical equipment to remove burrs, scales and welding marks on the inner surface of stainless steel pipes through grinding, polishing and other processes to make the surface smooth and flat, which not only improves the aesthetics of stainless steel pipe fittings, but also reduces the friction resistance of the inner surface, improves the fluid transmission efficiency of the pipe, and can also form a dense oxide film on the inner surface of stainless steel pipe fittings, improves corrosion resistance and prolongs the service life of the pipe. However, under the existing technology, conventional stainless steel pipe fitting inner surface polishing processing technology can often only be used for pipe fittings with shorter lengths or larger apertures. A single grinding head is driven by a motor to polish inside the stainless steel pipe. For pipe fittings with longer lengths or larger diameter-to-length ratios, the polishing effect is not good, which affects the overall performance of the stainless steel pipe fittings and the efficiency of the polishing operation.

Summary of the invention

The technical problem to be solved by the present invention is to provide a device and method for polishing the inner surface of an ultra-long and ultra-thin pipe, so as to solve the technical problem that the existing device and method for polishing the inner surface of a pipe cannot achieve efficient polishing of the inner surface of an ultra-long and ultra-thin pipe.

In order to solve the above problems, the technical solution of the present invention is: an ultra-long and ultra-thin pipe inner surface polishing device, which is applied to a pipe to be polished with a length greater than or equal to 6 meters and less than or equal to 14 meters and a pipe diameter less than or equal to 20 mm, and the axial direction of the pipe to be polished is set as a first direction, comprising:

frame;

A pipe clamping part is arranged on the frame, and the pipe clamping part is provided with a plurality of clamping output ends arranged along a first direction and at a first preset interval, and is used to clamp and fix the pipe to be polished and limit the radial runout of the pipe body of the pipe to be polished;

An axial driving part, arranged on the frame, wherein an output end of the axial driving part is used to output a reciprocating motion along a first direction;

A rotation output part is installed at the output end of the axial driving part, and the output end of the rotation output part is used to output a rotation motion with the axis of the pipe to be polished as the rotation axis;

A rotary rod, mounted at the output end of the rotary output portion, and used to extend into the inner cavity of the pipe to be polished;

A plurality of guide wheels, a plurality of which are arranged on the rotating rod along the first direction and at a second preset spacing, wherein the spacing between the outer ring surface of the guide wheel and the inner ring surface of the pipe to be polished is a first spacing, and the first spacing is less than or equal to 0.5 mm, and is used to limit the radial runout caused by the rotation of the rotating rod in the pipe to be polished;

A plurality of polishing units are arranged at intervals on the rotating rod along the first direction, and at least one polishing unit is arranged between two adjacent guide wheels.

During the polishing operation, the clamping output end clamps and fixes the tube body of the tube to be polished, limiting the radial runout of the tube body of the tube to be polished; a plurality of guide wheels are arranged on the rotating rod along the second preset spacing, limiting the maximum radial runout of the rotating rod portion located between adjacent guide wheels, so as to prevent the rotating rod from hitting the inner wall surface of the tube to be polished.

Preferably, the clamping output end comprises a first clamping portion and a second clamping portion arranged on both sides of the first direction, the relative clamping end surfaces of the first clamping portion and the second clamping portion are V-shaped notches, and the first clamping portion and the second clamping portion are driven by cylinders to move toward each other.

Preferably, the first preset distance is 0.5-0.7m.

Preferably, the axial driving part includes a first motor, and a slider is provided at the bottom of the axial driving part, the top end surface of the frame is provided with a rack and a slide rail extending along a first direction, the output shaft of the first motor is provided with a first gear meshing with the rack, and the slider is slidably connected to the slide rail.

Preferably, the rotation output part includes a second motor and a limit seat, a second gear is provided at the first position of the end of the rotating rod, and the output shaft of the second motor is provided with a third gear meshing with the second gear; the limit seat is provided with a bearing on the end face perpendicular to the shaft of the rotating rod, and the second position of the end of the rotating rod is fixedly connected to the inner ring of the bearing.

Preferably, the swivel rod body is provided with circumferential slots in sequence along the second preset distance, and the guide wheel comprises a first guide wheel and a second guide wheel, and the first guide wheel and the second guide wheel are respectively attached to the bottom end surfaces of the swivel rod slots.

Preferably, the second preset distance is 0.4-0.6m.

Preferably, the polishing unit comprises a plurality of ceramic fibers, a fixing ring is provided at the end of the polishing unit and fixedly connected to the rod body of the rotating rod, and the tail of the polishing unit diverges outwards under the centrifugal force generated by the rotation of the rotating rod.

Preferably, a through hole is provided in the axial center of the rotating rod, and a plurality of air holes which are perpendicular to the through hole and have intersecting apertures are provided in the rod body of the rotating rod. A rotating joint is provided at the third position of the end of the rotating rod, and the fixed end of the rotating joint is connected to the inner wall surface of the pipe mouth of the rotating rod through a threaded seal, and the air port end of the rotating joint is connected to the air pump.

A method for polishing the inner surface of an ultra-long and ultra-thin tube, applied to the above-mentioned ultra-long and ultra-thin tube inner surface polishing device, comprises the following steps:

S1: The pipe to be polished is sleeved on the outer side of the rotating rod, and the pipe clamping part is closed to clamp and fix the pipe to be polished;

S2: starting the rotation output part, adjusting the output end of the rotation output part to drive the rotation speed of the rotating rod to 6000-8000 r/min, so that the tail of the polishing unit diverges outward under the centrifugal force generated by the rotation of the rotating rod;

S3: Start the axial drive unit, adjust the axial drive unit to drive the rotating rod to reciprocate along the first direction to a distance of 0.6-0.8m, and the axial drive unit to drive the rotating rod to reciprocate along the first direction to a speed of 0.12-0.18m/s.

Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

(1) In the ultra-long and ultra-thin tube inner surface polishing device and method mentioned in the present invention, a rotating rod and a polishing unit arranged on the surface of the rotating rod are extended into the inner cavity of the tube to be polished, and the inner surface of the tube to be polished is polished by the high-speed rotation of the rotating rod and the polishing unit around the axis. In this technology, for ultra-long and ultra-thin tubes, clamping output ends are sequentially arranged at a fixed distance on both sides of the tube to be polished. During the polishing operation, the clamping output ends clamp and fix the tube body of the tube to be polished, effectively preventing the ultra-long and ultra-thin tube body to be polished from radially jumping under the force generated by the rotating friction of the rotating rod inside the tube. At the same time, guide wheels are sequentially arranged at fixed distances along the surface of the rotating rod, and a gap of less than or equal to 0.5 mm is maintained between the guide wheels and the inner wall surface of the tube to be polished, so as to prevent the rotating rod from radially jumping inside the tube to be polished under the action of rotation, thereby affecting the polishing effect and causing the rotating rod to hit the inner wall surface of the tube to be polished and cause damage. Through the arrangement of the pipe clamping part and the guide wheel, during the polishing process of the device, the rotating rod and the pipe to be polished can maintain a relatively stable state, which greatly improves the polishing effect and operation safety.

(2) In a device and method for polishing the inner surface of an ultra-long and ultra-thin tube mentioned in the present invention, polishing units are arranged in sequence at fixed intervals along the rod body of a rotating rod, and a rotating output part is provided for driving the rotating rod to drive the polishing unit to rotate around an axis. An axial driving part is also provided. When the rotating output part is turned on, the rotating output part drives the rotating rod to reciprocate along the axial direction of the tube to be polished, so that in a single polishing operation, the overall polishing of the inner wall surface of the ultra-long and ultra-thin tube can be achieved through the cooperation of the rotating rod and the polishing unit. On the one hand, the polishing function for the ultra-long and ultra-thin tube is realized, and on the other hand, the polishing efficiency is greatly improved.

(3) In the device and method for polishing the inner surface of an ultra-long and ultra-thin tube mentioned in the present invention, a through hole is provided at the axial center of the rotating rod, and air holes perpendicular to the through hole and intersecting with the aperture are provided in sequence along a fixed distance on the rod body of the rotating rod, and a rotating joint and an air pump are provided at the port of the rotating rod. During the polishing operation, the air pump is started so that the dust in the tube to be polished is sucked out through the air holes and the through hole, thereby reducing the wear of the inner wall of the tube caused by the dust generated in the tube to be polished, which is beneficial to improving the polishing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural diagram of a device for polishing the inner surface of an ultra-long and ultra-thin tube provided in this embodiment;

FIG2 is a structural diagram of an axial drive unit and a rotation output unit provided in this embodiment;

FIG3 is a structural diagram of the clamping output end provided in this embodiment;

FIG4 is an overall structural diagram of the conveying assembly provided in this embodiment;

FIG5 is a detailed structural diagram of a conveying assembly provided in this embodiment;

FIG. 6 is a structural diagram of a rotary rod provided in this embodiment.

Explanation of the reference numerals: 1: frame; 2: pipe clamping part; 201: clamping output end; 202: first clamping part; 203: second clamping part; 3: axial driving part; 301: first motor; 302: slider; 303: slide rail; 304: rack; 305: first gear; 4: rotation output part; 401: second motor; 402: limit seat; 403: second gear; 404: third gear; 5: rotating rod; 6: conveying assembly; 601: suspension frame; 602: guide roller; 603: support roller; 604: first guide platform; 605: second guide platform; 7: guide wheel; 8: polishing unit; 9: rotary joint.

Detailed ways

The following is a further detailed description of an ultra-long and ultra-thin tube inner surface polishing device and method proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

First embodiment

Referring to FIGS. 1 to 6 , an ultra-long and ultra-thin pipe inner surface polishing device provided in this embodiment is applied to pipes to be polished with a length of 6 meters or more and 14 meters or less and a diameter of 20 mm or less, and the axial direction of the pipe to be polished is set to be a first direction, comprising: a frame 1; a pipe clamping portion 2, which is arranged on the frame 1, and the pipe clamping portion 2 is provided with a plurality of clamping output ends 201 arranged along the first direction and at intervals of a first preset spacing, which are used to clamp and fix the pipe to be polished and limit the radial runout of the pipe body to be polished; an axial driving portion 3, which is arranged on the frame 1, and the output end of the axial driving portion 3 is used to output reciprocating motion along the first direction; a rotating output portion 4, which is installed on the axial The output end of the driving part 3 and the output end of the rotating output part 4 are used to output the self-rotation motion with the axis of the pipe to be polished as the rotation axis; the rotating rod 5 is installed at the output end of the rotating output part 4 and is used to extend into the inner cavity of the pipe to be polished; a plurality of guide wheels 7 are arranged on the rotating rod 5 along the first direction and at intervals of a second preset spacing, the spacing between the outer ring surface of the guide wheel 7 and the inner ring surface of the pipe to be polished is the first spacing, the first spacing is less than or equal to 0.5mm, and is used to limit the radial runout caused by the self-rotation of the rotating rod 5 in the pipe to be polished; a plurality of polishing units 8 are arranged on the rotating rod 5 at intervals along the first direction, and at least one polishing unit 8 is arranged between two adjacent guide wheels 7.

In a super-long and super-thin tube inner surface polishing device provided in this embodiment, the main body of the rotating rod 5 is a continuous rod, and polishing units 8 are arranged in sequence at intervals of 0.4-0.6m on the rod surface of the rotating rod 5. During the polishing operation, the rotating rod 5 and the polishing units 8 are all extended into the inner cavity of the tube to be polished, and the inner surface of the tube to be polished is polished by the self-rotational motion of the rotating rod 5 around the axis of the tube to be polished as the rotation axis and the reciprocating motion along the first direction. By setting a plurality of groups of polishing units 8, the efficiency of the polishing operation can be greatly improved.

Among them, the pipe clamping part 2 is provided with a plurality of clamping output ends 201 spaced at a first preset distance on both sides of the pipe to be polished along the first direction, and the clamping output ends 201 are used to clamp and fix the pipe to be polished. The fixing effect of the pipe clamping part 2 allows the super-long and super-thin pipe body to be polished to maintain a stable axial position, thereby preventing the force generated by the rotation and movement of the rotating rod 5 in the pipe during the polishing process from causing the pipe to be polished to have radial runout, wherein the first preset spacing range is set to 0.5-0.7m. At the same time, guide wheels 7 are sequentially provided at the second preset spacing of the rotating rod 5 body, the diameter of the guide wheel 7 is greater than the shaft diameter of the rotating rod 5, and the distance between the outer wall of the guide wheel 7 and the inner wall of the pipe to be polished is less than or equal to 0.5mm, wherein the second preset distance range is set to 0.4-0.6m, so that the rotating rod 5 cannot move vertically for a large distance in the pipe to be polished, and during the polishing process, it is used to prevent the rotating rod 5 from having radial runout in the state of high-speed rotation and movement, causing the rotating rod 5 to hit the inner wall of the pipe to be polished. By cooperating the pipe clamping part 2 of the pipe to be polished with the guide wheel 7 of the position-limiting rotating rod 5, the axes of the rotating rod 5 and the pipe to be polished are in a relatively stable posture during the polishing process, avoiding the whip effect of the pipe to be polished and the rotating rod 5 to produce bending and jumping. Through the radial runout instrument detection in the experimental stage, the radial runout range of the rotating rod 5 is controlled between 0.5-1mm during the polishing process, which can effectively avoid the collision of the rotating rod 5 with the inner surface of the pipe to be polished during the polishing process. The ultra-long and ultra-thin pipe inner surface polishing device provided in this embodiment effectively overcomes the technical problem that it is difficult to polish the inner surface of the ultra-long and ultra-thin pipe, improves the polishing efficiency, and ensures the safety of the polishing operation.

Preferably, the clamping output end 201 includes a first clamping part 202 and a second clamping part 203 arranged on both sides of the first direction, the relative clamping end faces of the first clamping part 202 and the second clamping part 203 are V-shaped grooves, and the tails of the first clamping part 202 and the second clamping part 203 are respectively provided with cylinders, which are driven by the cylinders to move towards each other. After the pipe to be polished is completely sleeved on the rod body of the rotating rod 5, the driving cylinders of the first clamping part 202 and the second clamping part 203 are started, the relative clamping end faces of the first clamping part 202 and the second clamping part 203 are fitted and a cavity is formed in the center of the clamping end faces for clamping and fixing the pipe to be polished, so that the stability and firmness of the pipe to be polished are better. Similarly, after the polishing operation is completed, the driving cylinder is closed to release the fixation of the pipe to be polished.

Preferably, the axial driving part 3 is arranged on the top end surface of the frame 1, including the main body of the axial driving part 3 and the first motor 301. A double-track slider 302 is provided at the bottom of the main body of the axial driving part 3. A double-track slide rail 303 extending along the first direction is provided on the top end surface of the frame 1. The slide rail 303 is slidably connected with the slider 302 to realize the movement of the axial driving part 3 along the first direction on the top end surface of the frame 1. At the same time, the first motor 301 is vertically arranged and fixedly connected with the main body of the axial driving part 3. A rack 304 extending along the first direction is also provided on the top end surface of the frame 1. A first gear 305 is provided at the bottom of the first motor 301 to mesh with the rack 304. When the first motor 301 is started, the first gear 305 cooperates with the rack 304 to realize the reciprocating motion of the axial driving part 3 on the top end surface of the frame 1. Among them, the reciprocating movement distance of the axial driving part 3 along the first direction is set to 0.6-0.8m, the moving speed is set to 0.12-0.18m/s, and the reciprocating movement distance of the axial driving part 3 is greater than or equal to the spacing of the polishing unit 8 set on the rotating rod 5, so that when the axial driving part 3 reciprocates, the movement trajectory of the polishing unit 8 can completely cover the inner surface of the pipe to be polished, ensuring that the polishing unit 8 is in uniform contact with the inner surface of the pipe to be polished during the polishing operation.

Preferably, the rotating output part 4 is fixed to the main body of the axial driving part 3, and includes a second motor 401 and a limit seat 402, wherein the second motor 401 is arranged along the first direction and the output shaft of the second motor 401 coincides with the axis of the pipe to be polished, the output shaft of the second motor 401 is provided with a third gear 404, and a second gear 403 is provided at the first position of the end of the rotating rod 5, and the third gear 404 is meshed with the second gear 403. When the second motor 401 is started, the output shaft of the second motor 401 drives the rotating rod 5 to rotate with the axis of the pipe to be polished as the rotating axis. The limit seat 402 is provided with a bearing on the end face perpendicular to the shaft body of the rotating rod 5. The rotating rod 5 is penetrated by the inner ring of the bearing and is fixedly connected to the inner ring of the bearing at the second position of the rotating rod 5. When the axial driving part 3 realizes reciprocating motion along the rack 304, it drives the rotating output part 4 to move synchronously along the first direction, and at the same time starts the rotating output part 4 to make the rotating rod 5 rotate. The limit seat 402 is used to limit the rotating rod 5 to reciprocate with the axial driving part 3 while ensuring the rotation of the rotating rod 5.

Preferably, the rod body of the rotating rod 5 is provided with circumferential first slots in sequence along the second preset distance, and the second preset spacing is 0.4-0.6m. The guide wheel 7 includes a first guide wheel and a second guide wheel, wherein the slot width of the rotating rod 5 matches the width of the guide wheel 7, and the inner ring end faces of the first guide wheel and the second guide wheel are respectively attached to the bottom end faces of the first slot of the rotating rod 5, and the first guide wheel and the second guide wheel cooperate to form a closed annular guide wheel 7.

Preferably, the rod body of the rotating rod 5 is arranged with circumferential second slots at intervals along the first direction, which are used to set the polishing unit 8. The interval distance range of the second slots is set to 0.4-0.6m. The polishing unit 8 includes a plurality of cylindrical ceramic fibers, which are evenly laid on the bottom end face of the second slot along the first direction. The ceramic fiber has a diameter of 0.5mm and a length of 80-120mm. A fixing ring is provided at the end of the polishing unit 8, and the end of the polishing unit 8 is fixedly connected to the bottom end face of the second slot of the rotating rod 5 through the fixing ring. When the rotating rod 5 rotates at a high speed, the tail of the polishing unit 8 diverges circumferentially outward. During the polishing operation, the tail end of the polishing unit 8 generates high-speed friction with the inner surface of the pipe to be polished, wherein the rod body diameter of the rotating rod 5 is 18mm, the inner diameter of the pipe to be polished is 20mm, and the distance between the outer ring surface of the rod body of the rotating rod 5 and the inner ring surface of the pipe to be polished is 1mm, which serves as a space for the tail end of the polishing unit 8 to diverge outward and rub against the inner surface of the pipe to be polished.

Preferably, a through hole is provided in the axial center of the rotating rod 5, and an opening is provided in the through hole at the third position of the end of the rotating rod 5. The rod body of the rotating rod 5 is provided with a plurality of air holes which are perpendicular to the through hole and intersecting with each other in diameter. The air holes are arranged at intervals of 0.4-0.6m along the first direction, and the circumferential intervals between adjacent air holes are 90°. A rotary joint 9 is provided at the opening at the third position of the end of the rotating rod 5. The fixed end of the rotary joint 9 is connected to the inner wall surface of the pipe opening at the third position of the rotating rod 5 by a threaded seal. The air port end of the rotary joint 9 is connected to an air pump. During the polishing operation, the rotating output part 4 and the axial driving part 3 are started so that the friction between the polishing unit 8 and the inner surface of the pipe to be polished will generate a large amount of dust. Under the action of the air pump, the dust is sucked out through the air holes and the through hole. The rotary joint 9 is arranged so that the self-rotation movement of the rotating rod 5 is not affected. The internal dust can be removed under the premise of ensuring the stable operation of the device, so as to avoid the dust from wearing the inner surface of the pipe to be polished and affecting the polishing effect.

In the ultra-long ultra-thin tube inner surface polishing device provided in this embodiment, a conveying assembly 6 is also included. The conveying assembly 6 is arranged along the first direction on one side of the axis extension of the rotating rod 5, and includes a hanger 601, a plurality of support rollers 603 and a plurality of guide rollers 602. Among them, the bottom of the support roller 603 is arranged on the top end surface of the frame 1, and the adjacent support rollers 603 are arranged at an interval of 0.8-1.2m. The hanger 601 is vertically fixed to the top end surface of the frame 1, the top of the guide roller 602 is fixedly connected to the top of the hanger 601, and the adjacent guide rollers 602 are arranged at an interval of 0.8-1.2m, and a cylinder is provided on the top of the guide roller 602 for driving the guide roller 602 to move vertically. The lower end surface of the guide roller 602 cooperates with the upper end surface of the support roller 603 to form an accommodating space for limiting the moving direction of the tube to be polished. The guide roller 602 and the support roller 603 are clamped and fixed by the cylinder on the top of the guide roller 602, and the tube to be polished can be moved in the first direction at the same time. At the same time, a first guide platform 604 is provided at the opposite end of the rotating rod 5 and the conveying assembly 6. The first guide platform 604 is provided with a first guide hole at the extension position of the axis of the rotating rod 5, and the inner diameter of the first guide hole gradually decreases from one end of the conveying assembly 6 to one end of the rotating rod 5. During the polishing operation, the pipe to be polished is placed in the accommodation space formed by the guide roller 602 and the support roller 603 and moves along the first direction toward one end of the rotating rod 5. One end of the pipe to be polished passes through the first guide hole and is sleeved on the rotating rod 5. The arrangement of the conveying assembly 6 and the first guide platform 604 makes it possible to more accurately dock the pipe to be polished with the rotating rod 5 during the conveying and alignment process of the pipe to be polished, thereby improving the operation efficiency. A second guide platform 605 is provided at one end of the conveying assembly 6 along the first direction and away from the first guide platform 604. The second guide platform 605 is provided with a second guide hole at the extension position of the axis of the pipe to be polished, and the inner diameter of the second guide hole gradually decreases from one end toward the conveying assembly 6 to one end away from the conveying assembly 6. After the polishing operation is completed, the polished pipe is separated from the rotating rod 5 along the first direction, and passes through the first guide platform 604, the conveying assembly 6 and the second guide platform 605 in sequence before being taken out.

Second embodiment

The present embodiment provides an ultra-long and ultra-thin tube inner surface polishing device, wherein the rod body of the rotating rod 5 includes a plurality of assembly rods of the same length connected in sequence, wherein the length of the assembly rods ranges from 0.4 to 0.6 m, wherein the outer sides of the tube openings at both ends of the assembly rods are respectively provided with external threads, the guide wheel 7 is a single annular member, and the inner end surface of the guide wheel 7 is provided with internal threads that match the external threads of the assembly rods, and the guide wheel 7 and the assembly rods are connected by threads to achieve a fixed connection between adjacent assembly rods. In the present embodiment, the rod body of the rotating rod 5 is constructed by splicing a plurality of assembly rods and a plurality of guide wheels 7, and the length of the rod body of the rotating rod 5 can be changed according to the actual length of the tube to be polished, so that the ultra-long and ultra-thin tube inner surface polishing device provided by the present embodiment has a wider variety of applicable scenarios.

Third embodiment

The present embodiment provides a method for polishing the inner surface of an ultra-long and ultra-thin tube, comprising the following steps:

S1: The pipe to be polished is sleeved on the outer side of the rotating rod 5, and the pipe clamping part 2 is opened so that the clamping output end 201 clamps and fixes the pipe to be polished;

S2: Start the rotating output part 4, adjust the output end of the rotating output part 4 to drive the rotating rod 5 to rotate at a speed of 6000-8000 r/min, so that the tail of the polishing unit 8 diverges outward under the centrifugal force generated by the rotation of the rotating rod 5, and frictionally contacts with the inner surface of the pipe to be polished;

S3: Start the axial drive unit 3, adjust the axial drive unit 3 to drive the rotating rod 5 to reciprocate along the first direction to a distance of 0.6-0.8m, and the axial drive unit 3 to drive the rotating rod 5 to reciprocate along the first direction to a speed of 0.12-0.18m/s, so that the friction contact area at the tail end of the polishing unit 8 can completely cover the inner surface of the pipe to be polished.

In a method for polishing the inner surface of an ultra-long and ultra-thin pipe provided in this embodiment, the rotating output part 4 drives the rotating rod 5 to rotate around the central axis of the pipe to be polished as the rotating axis, and the centrifugal force generated by the high-speed rotation of the rotating rod 5 causes the tail of the polishing unit 8 to diverge outward from the circumference of the rotating rod 5, thereby realizing high-speed friction between the polishing unit 8 and the inner surface of the pipe to be polished. The axial driving part 3 is used to drive the rotating output part 4 and the rotating rod 5 to reciprocate synchronously along the first direction to realize the change of the axial relative position of the rotating rod 5 and the pipe to be polished, wherein the moving distance is greater than or equal to the spacing between adjacent polishing units 8 set in the rotating rod 5, so that the movement trajectory of the polishing unit 8 can achieve full coverage of the inner surface of the pipe to be polished, while ensuring the polishing effect and greatly improving the polishing efficiency. At the same time, during the entire polishing operation, the pipe clamping part 2 is opened to achieve the function of clamping and fixing the pipe to be polished, ensuring the overall stability of the pipe to be polished, and fundamentally overcoming the technical problem that the inner surface of the ultra-long and ultra-thin pipe cannot be polished at the same time.

Preferably, the method further comprises the following steps:

S4: before the pipe to be polished is sleeved on the rotating rod 5, the rod to be polished is placed on the upper end surface of the supporting roller 603 along the first direction, and the top cylinder of the guide roller 602 is started, and the guide roller 602 moves vertically so that the lower end surface of the guide roller 602 abuts against the pipe body of the pipe to be polished;

S5: moving the pipe to be polished along the first direction toward one end of the rotating rod 5, so that one end of the pipe to be polished passes through the guide platform and is sleeved with the rotating rod 5, and the pipe to be polished is completely sleeved on the outer side of the rotating rod 5;

S6: During the polishing operation, the air pump is started so that the dust inside the pipe to be polished is sucked out through the air holes and through holes;

S7: After the polishing operation is completed, the axial driving part 3, the rotating output part 4 and the air pump are closed, and the pipe clamping part 2 is closed so that the clamping output end 201 is opened, and the polished pipe is taken out by moving along the first direction.

The accommodation space formed by the upper end surface of the support roller 603 and the lower end surface of the guide roller 602 is used to limit the setting position and direction of the pipe to be polished. At the same time, the accurate direction correction of the guide platform realizes the accurate docking of the pipe to be polished and the rotating rod 5, which improves the work efficiency and reduces the difficulty of docking of super-long and super-thin pipes. At the same time, the dust in the pipe to be polished is sucked out by the air pump and the through hole and air hole of the rotating rod 5 to avoid the dust from causing wear on the inner surface of the pipe and affecting the polishing effect.

The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an overlength superfine pipe fitting internal surface burnishing device which characterized in that is applied to the pipe fitting that waits to polish that length is greater than or equal to 6 meters less than or equal to 14 meters, pipe diameter less than or equal to 20mm, sets for wait to polish the axial of pipe fitting and be first direction, includes:

a frame;

The pipe fitting clamping part is arranged on the frame and is provided with a plurality of clamping output ends which are arranged along the first direction at intervals of a first preset interval and used for clamping and fixing a pipe fitting to be polished and limiting radial runout of a pipe body of the pipe fitting to be polished;

the axial driving part is arranged on the rack, and the output end of the axial driving part is used for outputting reciprocating motion along a first direction;

the rotary output part is arranged at the output end of the axial driving part and is used for outputting autorotation movement taking the axis of the pipe fitting to be polished as a rotating shaft;

The rotary rod piece is arranged at the output end of the rotary output part and is used for extending into the inner cavity of the pipe fitting to be polished;

The guide wheels are arranged on the rotary rod piece at intervals along the first direction at a second preset interval, the interval between the outer ring surface of the guide wheels and the inner ring surface of the pipe fitting to be polished is a first interval, and the first interval is less than or equal to 0.5mm and is used for limiting radial runout generated by rotation of the rotary rod piece in the pipe fitting to be polished;

the polishing units are arranged on the rotary rod piece at intervals along the first direction, and at least one polishing unit is arranged between two adjacent guide wheels;

in polishing operation, the clamping output end clamps and fixes the pipe body of the pipe to be polished, and limits radial runout of the pipe body of the pipe to be polished; and a plurality of guide wheels are arranged on the rotary rod piece along the second preset interval, and the maximum radial runout of the rotary rod piece part between the adjacent guide wheels is limited, so that the rotary rod piece is prevented from striking the inner wall surface of the pipe fitting to be polished.

2. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein the clamping output end comprises a first clamping part and a second clamping part which are arranged at two sides in a first direction, opposite clamping ends of the first clamping part and the second clamping part are V-shaped notches, and the first clamping part and the second clamping part are driven by air cylinders to move in opposite directions respectively.

3. The apparatus of claim 1, wherein the first predetermined distance is 0.5-0.7m.

4. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein the axial driving part comprises a first motor, a sliding block is arranged at the bottom of the axial driving part, a rack and a sliding rail extending along a first direction are arranged on the top end face of the rack, a first gear is arranged on an output shaft of the first motor and meshed with the rack, and the sliding block is in sliding connection with the sliding rail.

5. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein the rotary output part comprises a second motor and a limiting seat, a second gear is arranged at a first position of the end part of the rotary rod piece, and a third gear is arranged on an output shaft of the second motor and meshed with the second gear; the limiting seat is provided with a bearing on the end face perpendicular to the shaft body of the rotary rod piece, and the second position of the end part of the rotary rod piece is fixedly connected with the inner ring of the bearing.

6. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein the rotary rod body is sequentially provided with circumferential notches along the second preset distance, the guide wheels comprise a first guide wheel and a second guide wheel, and the first guide wheel and the second guide wheel are respectively attached to the bottom end surfaces of the notches of the rotary rod body.

7. The apparatus of claim 1, wherein the second predetermined distance is 0.4-0.6m.

8. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein the polishing unit comprises a plurality of ceramic fibers, a fixing ring is arranged at the end part of the polishing unit and fixedly connected with the rod body of the rotary rod, and the tail part of the polishing unit diverges outwards under the action of centrifugal force generated by the rotation motion of the rotary rod.

9. The device for polishing the inner surface of an ultra-long ultrafine pipe fitting according to claim 1, wherein a through hole is formed in the axial center of the rotary rod member, a plurality of air holes perpendicular to the through hole and intersecting with the through hole are formed in the rotary rod member, a rotary joint is arranged at a third position of the end part of the rotary rod member, the fixed end of the rotary joint is in threaded sealing connection with the inner wall surface of the pipe orifice of the rotary rod member, and the air port end of the rotary joint is communicated with the air pump.

10. A method for polishing the inner surface of an ultra-long ultra-fine pipe fitting, which is applied to the device for polishing the inner surface of an ultra-long ultra-fine pipe fitting according to any one of claims 1 to 9, comprising the steps of:

S1: the pipe fitting to be polished is sleeved on the outer side of the rotary rod piece, and the pipe fitting clamping part is closed to clamp and fix the pipe fitting to be polished;

S2: starting the rotary output part, and adjusting the rotation speed of the rotary rod piece driven by the output end of the rotary output part to be 6000-8000r/min, so that the tail part of the polishing unit diverges outwards under the action of centrifugal force generated by the rotation of the rotary rod piece;

S3: the axial driving part is started, the axial driving part is adjusted to drive the rotary rod piece to reciprocate along the first direction, the moving distance is 0.6-0.8m, and the axial driving part drives the rotary rod piece to reciprocate along the first direction, and the moving speed is 0.12-0.18m/s.